1.Spamming and Advertising combined.
2.A phenomenon often present on internet forums and communities, which can be really annoying to both members and staff (moderators and administrators).
3. Repetitive ad posting on a forum by a series of accounts created solely for advertising, often by companies like UMG-D.

Oh damn, yet another UMGD intern registered and has already started spadvertising...A moderator should act soon.